JP2001224553A - Imaging instrument for capusle endoscope - Google Patents

Imaging instrument for capusle endoscope

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Publication number
JP2001224553A
JP2001224553A JP2000039319A JP2000039319A JP2001224553A JP 2001224553 A JP2001224553 A JP 2001224553A JP 2000039319 A JP2000039319 A JP 2000039319A JP 2000039319 A JP2000039319 A JP 2000039319A JP 2001224553 A JP2001224553 A JP 2001224553A
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Prior art keywords
means
signal
capsule endoscope
image
power supply
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JP2000039319A
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Japanese (ja)
Inventor
Masaru Eguchi
Masahiro Fushimi
Masaaki Nakajima
Tetsuya Nakamura
Taichi Nakanishi
Ichiro Ninomiya
Kenichi Ohara
雅章 中島
哲也 中村
太一 中西
一郎 二ノ宮
正寛 伏見
健一 大原
勝 江口
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Asahi Optical Co Ltd
旭光学工業株式会社
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
    • A61B1/041—Capsule endoscopes for imaging
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00002—Operational features of endoscopes
    • A61B1/00025—Operational features of endoscopes characterised by power management
    • A61B1/00036—Means for power saving, e.g. sleeping mode
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00002—Operational features of endoscopes
    • A61B1/00011—Operational features of endoscopes characterised by data transmission
    • A61B1/00016—Operational features of endoscopes characterised by data transmission using wireless means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/02—Operational features
    • A61B2560/0204—Operational features of power management
    • A61B2560/0209—Operational features of power management adapted for power saving

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized imaging instrument for capsule endoscope with small power consumption.
SOLUTION: This imaging device for capsule endoscope comprises a lighting means for lighting a subject part within a body cavity, an image sensor having a photoelectric converting means for photoelectrically converting the subject light to a signal charge and accumulating it and a scanning means for scanning and reading the accumulated signal charge, which outputs the image signal read by the scanning means, a signal processing means for processing the image signal, a transmitting means for wirelessly transmitting the signal charge accumulated by the image sensor as image signal, and a power supplying means for supplying power, all of which means are provided within a sealed capsule. The device alternately repeats a lighting cycle of setting the power supply at least to the lighting means ON to accumulate the signal charge in the image sensor; and a transmitting cycle of setting the power supply to at least the scanning means of the image sensor, the signal processing means and the transmitting means ON to transmit the image signal.
COPYRIGHT: (C)2001,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【０００１】 [0001]

【技術分野】本発明は、体内に導入されて体腔内を撮像し、この画像を体外に無線送信するカプセル内視鏡の撮像装置に関する。 TECHNICAL FIELD The present invention is introduced into the body by imaging the body cavity, the image relates to an image pickup apparatus of the capsule endoscope wirelessly transmits the body.

【０００２】 [0002]

【従来技術およびその問題点】体内管腔を観察する手段として、長い可撓管で外部機器と接続された従来の内視鏡に対し、被検者の苦痛の軽減等を目的に、外部機器と接続せずに利用できるカプセル内視鏡が提案されている。 As BACKGROUND OF THE INVENTION means for observing a body lumen, to a conventional endoscope which is connected to an external device with a long flexible tube, the purpose of alleviating such pain of the subject, an external device capsule endoscopy available without connections are proposed. カプセル内視鏡はイメージセンサや送信器等の撮像装置を内蔵したカプセル型の内視鏡を被検者に嚥下させ、体腔内から被検部の像を無線送信することができる。 Capsule endoscope is swallowing the endoscope of the capsule with a built-in image pickup device such as an image sensor and a transmitter in a subject, it is possible to wirelessly transmit the image of the object part from the body cavity. このカプセル内視鏡は被検者の消化管蠕動運動によって被検者の体腔内を進行し、その速度は１分間に数ｍ The capsule endoscope proceeds inside the body cavity of the subject by the gastrointestinal peristalsis of the subject, the number m in the speed 1 minute
ｍ程度であるから、嚥下してから体外に放出される検査終了まで数十時間を要する。 Because it is about m, it takes several tens of hours after swallowing up inspection end released from the body.

【０００３】このカプセル内視鏡を、数十時間にわたり駆動させるのに十分な電力供給を行うには、内蔵電池が大型化してしまい、カプセル内視鏡を小型化することができない。 [0003] The capsule endoscope, to provide sufficient power to drive for several tens of hours, the internal battery is increased in size, it is impossible to reduce the size of the capsule endoscope. 電池を小型にすると、嚥下後長時間かかって到達する下部消化管まで観察することは不可能である。 When the battery small, it is not possible to observe up to the lower digestive tract to reach suffering long after swallowing.

【０００４】 [0004]

【発明の目的】本発明は、このようなカプセル内視鏡の問題点に基づき、消費電力が少ない小型のカプセル内視鏡の撮像装置を提供することを目的とする。 SUMMARY OF THE INVENTION The present invention is based on the problem of the capsule endoscope, and an object thereof is to provide an imaging apparatus of low power consumption small capsule endoscope.

【０００５】 [0005]

【発明の概要】本発明は、カプセル内視鏡が蠕動運動により体腔内を移動する速度が非常に遅く、動画でなく静止画による観察でも充分であることを考慮してなされたものである。 SUMMARY OF THE INVENTION The present invention is intended to capsule endoscope peristalsis very slow speed for moving the body cavity by, it has been made in view that it is also sufficient by observation with still images rather than video. すなわち、本発明によるカプセル内視鏡の撮像装置は、体腔内の被検部を照明する照明手段と；被検部を撮像し、画像信号を出力する撮像手段と；画像信号を無線送信する送信手段と；電力を供給する電力供給手段と；を密閉カプセル内に備え、少なくとも上記照明手段への電力供給をオンにして上記撮像手段に信号電荷を蓄積させる照明サイクルと；少なくとも上記撮像手段および送信手段への電力供給をオンにして上記画像信号を送信させる送信サイクルと；を交互に繰り返すことを特徴としている。 That is, the imaging device of the capsule endoscope according to the present invention, the illumination means and for illuminating the object part in the body cavity; imaging the object part, and imaging means for outputting an image signal; an image signal wirelessly transmits transmission electric power supply means for supplying electric power; means and a provided in the sealed capsule, and lighting cycle for accumulating the signal charges to said image pickup means to turn on the power supply to at least said illuminating means, at least the imaging unit and transmitted It is characterized by repeating alternately; Turn on power supply to the unit and transmission cycle to transmit the image signal. 上記の撮像手段は、被写体光を信号電荷に光電変換し蓄積する光電変換手段と、蓄積した信号電荷を走査し読み出す走査手段を備え、該走査手段によって読み出した画像信号を出力するイメージセンサと； It said imaging means includes a photoelectric conversion means for accumulating photoelectrically converts subject light into a signal charge, comprising a scanning means for reading and scanning the stored signal charges, an image sensor that outputs an image signal read by said scanning means;
この画像信号を処理する信号処理手段と；を備えることができる。 Signal processing means for processing the image signal; can comprise.

【０００６】このカプセル内視鏡の撮像装置において、 [0006] In the imaging device of the capsule endoscope,
上記照明手段による被写体照度に対応して、上記照明サイクルは１フィールド分または１フレーム分の信号電荷を蓄積可能な時間であり、上記送信サイクルは１フィールド分または１フレーム分の画像信号を読み出して送信可能な時間とすることが好ましい。 Corresponding to the object illuminance by the illumination means, the illumination cycle is capable of storing time for one field or one frame of the signal charges, the transmission cycle reads the image signal of one field or one frame it is preferable that the transmittable time. また、上記照明サイクルと送信サイクルを１秒間に１回ずつ実行すると実際的である。 It is also practical when executing the transmission cycle and the illumination cycle once every second.

【０００７】また、上記照明手段は発光ダイオードであって、送信手段に電力が供給されたときには逆方向電圧がかかって消灯し、送信手段に電力が供給されていないときは順方向電圧がかかって点灯するように配置すると、照明手段で消費される電力の節減が容易である。 Further, the above illuminating means a light emitting diode, when the power is supplied to the transmitting unit off takes reverse voltage, when no power is supplied to the transmission means takes forward voltage placing to light, it is easy to save the power consumed by the lighting means. あるいは、上記走査手段、信号処理手段および送信手段と、照明手段とに対する電力供給の切換手段を備えてもよい。 Alternatively, the scanning means, and the signal processing means and transmitting means may comprise switching means for the power supply to the illumination means.

【０００８】 [0008]

【発明の実施の形態】以下、図面に基づいて本発明を説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings. 図４に示すように撮像装置１０を密閉カプセルに収納したカプセル内視鏡８０は、被検者が嚥下して体腔内に導入される。 Capsule endoscope 80 that houses the image pickup apparatus 10 in a sealed capsule as shown in Figure 4, is introduced into a body cavity subject is swallowed. 導入されたカプセル内視鏡８０は、 Introduced the capsule endoscope 80,
照明手段としてのＬＥＤ４０で照明した体腔面（被検部）の像を、撮像光学系Ｌによって形成してイメージセンサ２１で撮像し、この画像を送信アンテナ６２から無線送信する。 The image of the body cavity surface which is illuminated with LED40 as the illumination means (object part), captured by the image sensor 21 formed by the imaging optical system L, and wirelessly transmits the image from the transmitting antenna 62.

【０００９】この撮像および送信を行う撮像装置１０のブロック図を図１に示す。 [0009] shows a block diagram of an imaging apparatus 10 for the imaging and transmission in Figure 1. 撮像装置１０は、イメージセンサ部２０とＬＥＤ４０を搭載した基板１２と、変調部５０と送信部６０を搭載した基板１４とで構成される。 Imaging device 10 is composed of an image sensor unit 20 and the substrate 12 mounted with LED 40, a substrate 14 mounted with modulation unit 50 and the transmitting unit 60.
イメージセンサ部２０は、イメージセンサ２１、ビデオ信号生成回路３０を搭載している。 The image sensor unit 20 has an image sensor 21, is equipped with a video signal generation circuit 30. イメージセンサ２１ The image sensor 21
は、水平、垂直シフトレジスタ（走査手段）２２Ｈ、２ Is horizontal, vertical shift register (scan means) 22H, 2
２Ｖとイメージエリア（光電変換手段）２３を備え、被写体光をイメージエリア２３で光電変換して信号電荷を蓄積し、この信号電荷をシフトレジスタ２２Ｈ、２２Ｖ Comprising a 2V and image area (photoelectric conversion means) 23, and photoelectrically converted to accumulate signal charges in the image area 23 subject light, the shift register 22H to signal charges, 22V
によって走査し画像信号として出力するＭＯＳ型の周知のものである。 It is well known in the MOS type which outputs as a scanning image signal by. ビデオ信号生成回路３０は、サンプルホールド回路（Ｓ／Ｈ）３１、Ａ／Ｄコンバータ３２、ビデオプロセッサ３３、エンコーダ３４を備えている。 Video signal generating circuit 30, a sample hold circuit (S / H) 31, A / D converter 32, video processor 33 includes an encoder 34. イメージセンサ２１から出力された画像信号はサンプルホールド回路３１でホールドされてＡ／Ｄコンバータ３２ Image signal output from the image sensor 21 is held by the sample-and-hold circuit 31 A / D converter 32
でＡ／Ｄ変換され、ビデオプロセッサ３３で所定の画像信号処理され、エンコーダ３４で所定方式のビデオ信号に変換される。 In converted A / D, it is processed a predetermined image signal by the video processor 33 and converted into a video signal of a predetermined method by the encoder 34.

【００１０】基板１２はさらに、第１発振器４２、インバータ４４、第１発振器４２から出力された信号に基づいてイメージセンサ部２０を駆動する駆動信号（走査読み出し信号）、同期信号等をシーケンシャルに出力するタイミングジェネレータ（ＴＧ）４６を備えている。 [0010] substrate 12 further outputs a first oscillator 42, an inverter 44, a drive signal for driving the image sensor unit 20 on the basis of the signal output from the first oscillator 42 (scan read signal), the synchronization signal or the like sequentially and a timing generator (TG) 46 to. インバータ４４はタイミングジェネレータ４６の信号を受けて変調部５０と送信部６０の電源をオンオフするもので、このオンオフに伴って基板１２に備えられたＬＥＤ The inverter 44 is intended to turn on and off the power of the modulating unit 50 and transmitting unit 60 receives the signal from the timing generator 46, LED provided in the substrate 12 in accordance with this off
４０が消灯／点灯する。 40 is turned off / lights. 変調部５０と送信部６０の電源がオンのときはＬＥＤ４０に逆方向電圧がかかるため点灯せず（送信サイクル）、変調部５０と送信部６０がオフのときはＬＥＤ４０に順方向電圧がかかり点灯する（照明サイクル）。 Power modulation section 50 and the transmitting unit 60 when on not lit for a reverse voltage is applied to the LED 40 (transmission cycle), the modulation unit 50 and the transmitting unit 60 is off is forward voltage LED 40 lit to (light cycle). すなわちＬＥＤ４０あるいは変調部５０および送信部６０のうち一方がオンすると他方はオフする回路構造になっている。 That other when one is turned on among the LED40 or modulating unit 50 and transmission unit 60 is in a circuit arrangement to turn off.

【００１１】基板１４の変調部５０は、変調器５１、搬送波信号を出力する第２発振器５２、掛け算器５３を備えている。 [0011] Modulation unit 50 of the substrate 14, a modulator 51, a second oscillator 52 for outputting a carrier signal, and a multiplier 53. 変調器５１にはエンコーダ３４の出力が入力され、ここで変調された信号と第２発振器５２の搬送波信号が掛け算器５３で掛け合わされる。 The modulator 51 the output of the encoder 34 is inputted, wherein the modulated signal and the carrier signal of the second oscillator 52 are multiplied by the multiplier 53. 基板１４の送信部６０は発信器６１、送信アンテナ６２を備え、変調部５０からの信号を、発信器６１を介して送信アンテナ６ Transmitting portion 60 of the substrate 14 comprises a transmitter 61, a transmitting antenna 62, transmitting a signal from the modulation unit 50, via the transmitter 61 antenna 6
２から発信する。 2 originating from.

【００１２】図２に、このカプセル内視鏡のバッテリー７０の電力供給をオンオフする電源スイッチ部分の回路図を示す。 [0012] FIG 2 is a circuit diagram illustrating a power switching portion that turns on and off the power supply battery 70 of the capsule endoscope. 磁界中に置かれると接点が開くリードスイッチ７１によって、スイッチングが非接触で行われるので、カプセル内視鏡は水密保持されている。 When placed in a magnetic field by the reed switch 71 to open the contacts, the switching is performed in a non-contact, the capsule endoscope is watertight retained. また、例えば輸送時または使用しないときなどには、磁石を備えた梱包箱または収納ケースにカプセル内視鏡を収納すれば、電源をオフにしておくことができる。 Further, for example, in such case, not during transport or use, if housed capsule endoscope on its packaging or storage case provided with a magnet, the power can be turned off to. リードスイッチ７１がオンして電源供給されると、タイミングジェネレータ４６により撮像装置１０は所定のサイクルでシーケンシャルに動作する。 When reed switch 71 is turned on power is supplied, the image pickup device 10 by the timing generator 46 operates sequentially in a predetermined cycle.

【００１３】図３に、照明サイクルと送信サイクルを切り換えるタイムチャートを示す。 [0013] Figure 3 shows a time chart for switching the lighting cycle transmission cycle. 照明サイクルと送信サイクルは、第１発振器４２から基本クロックを受けたタイミングジェネレータ４６が送出する同期信号で切りかえられる。 Light cycle and transmission cycle is switched by the synchronization signal to a timing generator 46 which receives the reference clock from the first oscillator 42 is sent. 照明サイクル（光蓄積時）では、ＬＥＤ４０ In light cycle (when optical storage), LED 40
から照明光が発せられてイメージセンサ２１に信号電荷が蓄積される。 Signal charges are accumulated in the image sensor 21 is emitted illumination light from. この間変調部５０と送信部６０は電源オフなので電力を消費しない。 During this time the modulation unit 50 and the transmitting section 60 does not consume power because power off. 送信サイクル（画像読み出し送信時）では、イメージセンサ２１から出力されビデオ信号生成回路３０によって生成されたビデオ信号が変調部５０に送出される。 In the transmission cycle (at the time of image reading transmission), a video signal generated by video signal generating circuit 30 is output from the image sensor 21 is sent to the modulator 50. ビデオ信号は変調部５０で変調され、発信器６１を介し送信アンテナ６２から送信される。 The video signal is modulated by the modulation unit 50, and transmitted from the transmission antenna 62 through the transmitter 61. この送信サイクル中、ＬＥＤ４０は点灯しない。 During this transmission cycle, LED40 is not turned on.

【００１４】以下に、本実施形態における照明サイクル（光蓄積時間ｔ１）と送信サイクル（送信時間ｔ２）を決定する計算例を示す。 [0014] The following shows an example of calculation for determining the illumination cycle in the present embodiment (light accumulating time t1) and the transmission cycle (transmission time t2). １）条件 照明光：ＬＥＤ 光度（点光源と仮定） ： ３〔ｍｃｄ〕（Ｍ． 1) Condition illumination: Assuming LED luminous intensity (point light source): 3 [mcd] (M.
Ｓ． S. Ｃ． C. Ｐ） 照明光から被写体までの距離：１０〔ｍｍ〕 撮像素子 撮像素子の感度 ：１５〔ｌｘ〕（Ｆ１．２） （光蓄積時間１／６０秒の場合） 撮像光学系の絞り値：Ｆ８ フィールド周波数ｆ v ＝６０Ｈｚ ２）光蓄積時間の計算 照度＝光度／距離2であるから、被写体の照度は 照度＝３×１０ -3 ／（１０×１０ -3 ） 2 ＝３０〔ｌｘ〕 P) the distance from the illumination light to the subject: 10 mm in sensitivity of the imaging device imaging device 15 [lx] (F1.2) (For light accumulating time of 1/60 second) imaging optics aperture value: F8 Field since the frequency f v = 60 Hz 2) of light accumulating time calculation illuminance = photometric / distance 2, illuminance of the subject illuminance = 3 × 10 -3 / (10 × 10 -3) 2 = 30 [lx] 上記の条件から、この撮像素子への入射光量は０．３ From the above conditions, the amount of light incident on the image pickup element is 0.3
〔ｌｘ〕であるから、通常必要とされる入射光量１５ Because it is [lx], the amount of incident light 15 which is normally required
〔ｌｘ〕に対し、１５／０．３＝５０で、約５０倍の蓄積時間があれば適正な露光による撮像（信号電荷の蓄積）が可能となる。 To [lx], at 15 / 0.3 = 50, it is possible to image pickup by the proper exposure if there is about 50 times the storage time (accumulation of signal charges). フィールド周波数が６０Ｈｚであるから、１フィールドあたりの走査時間（１６．７ｍｓ） Since the field frequency is 60 Hz, for one field scanning time (16.7 ms)
の５０倍、すなわち ｔ１＝１６．７〔ｍｓ〕×５０＝ ８３３ 〔ｍｓ〕 の光蓄積時間で、十分な光量（信号電荷）が得られる。 50-fold, i.e. at t1 = 16.7 [ms] × 50 = 833 light accumulating time of [ms], sufficient amount of light (signal charges) are obtained. ３）送信時間の計算 イメージエリア２３の画素構成を２００画素×２００画素とすれば全画素は４０ｋ画素、各画素が蓄積した信号電荷をデジタル変換（８ｂｉｔ分解）した後のデータ量は３２０ｋｂｉｔとなる。 3) the amount of data after if 200 pixels × 200 pixels a pixel configuration all the pixels to 40k pixels, each pixel has a signal charge stored digital conversion (8bit decomposition) transmission time computation image area 23 becomes 320kbit . 送信レートを１４〔Ｍｂｉｔ Transmission rate of 14 [Mbit
／ｓ〕とすれば、 ｔ２＝３２０〔ｋｂｉｔ〕／１４〔Ｍｂｉｔ／ｓ〕＝約 If / s], t2 = 320 [kbit] / 14 [Mbit / s] = about
２２．３ 〔ｍｓ〕 で送信は完了する。 Transmitted at 22.3 [ms] is completed. ４）１画面の構成時間 以上より、１画面分の画素信号を蓄積して送信するのに要する時間は、 ｔ１＋ｔ２＝８３３〔ｍｓ〕＋２２．３〔ｍｓ〕 ＝ ８５５．３〔ｍｓ〕となり、システム設計上、１画面の構成時間は１ｓとするのが望ましい。 4) From the above 1 screen configuration time, 1 is the time required to transmit to accumulate pixel signals of screen, t1 + t2 = 833 [ms] Tasu22.3 [ms] = 855.3 [ms], and the system By design, one screen configuration time is desirably to 1s.

【００１５】以上の計算例に従い、光蓄積および送信は１秒周期で行えば、体腔内における蠕動運動によるカプセルの移動は１分間に数ｍｍ程度なので、画像が大きく飛躍することもなく十分な観察が可能である。 [0015] In accordance with the above calculation example, by performing optical storage and transmission in the second period, since the movement of the capsule by the peristaltic motion in the body cavity of several mm per minute, it is also not sufficient that the image is greatly increased observation it is possible.

【００１６】なお本実施形態では、諸条件より１秒周期としたが、上記の計算例に限定されず、例えば画素数の異なるイメージセンサ２１を用いる場合には画素数に応じて送信サイクルを長くあるいは短くしたり、光度の異なるＬＥＤ４０を用いる場合には照明サイクルを調整するなどして実施できることはもちろんである。 [0016] In the present embodiment has been set to one second period from the conditions, not limited to the above calculation example, for example, when using an image sensor 21 having different numbers of pixels long transmission cycle according to the number of pixels Alternatively or short, in the case of using a different LED40 luminosity is of course to be carried out for example, by adjusting the lighting cycle. また、照明サイクルと送信サイクルの間に、双方電源オフサイクルを設けたり、複数の異なる照明時間あるいは光度で照明サイクルを実行する（オートブラケッティング）ことも可能である。 Further, between the illumination cycles transmission cycle, or both provided power-off cycle, it executes the illumination cycle at a plurality of different illumination time or intensity (auto bracketing) It is also possible.

【００１７】 [0017]

【発明の効果】以上のように、本発明のカプセル内視鏡の撮像装置によれば、信号電荷の蓄積時間を長くして照明を暗くし、さらに各部に対する電力供給を交互に行うことで消費電力を少なくできるので、バッテリーを小さくすることができ、小型で長時間駆動可能なカプセル内視鏡が実現できる。 As it is evident from the foregoing description, according to the imaging device of the capsule endoscope of the present invention, consumption by performing darken the illumination by increasing the storage time of the signal charges, further power supply to each portion alternately since possible to reduce the power, the battery can be reduced, long drive capsule endoscope in a small can be realized. また、照明ランプが暗く、発熱による問題も生じないので、人体に対し安全なカプセル内視鏡が実現できる。 The illumination lamp is dark, it is possible to avoid troubles due to heat generation, safety capsule endoscope to the human body can be realized.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図１】本発明による内視鏡の撮像装置の、回路構成の概要を示すブロック図である。 [1] of the image pickup apparatus of the endoscope according to the present invention, it is a block diagram showing an outline of the circuit configuration.

【図２】本カプセル内視鏡の撮像装置の、電源スイッチ部分を示す回路図である。 [Figure 2] of the image pickup apparatus of the present capsule endoscope is a circuit diagram showing a power switch portion.

【図３】照明サイクルと送信サイクルの切換を示すタイムチャートである。 3 is a time chart showing the switching of the lighting cycle and the transmission cycle.

【図４】本発明を適用したカプセル内視鏡を示す断面図である。 4 is a sectional view showing the applied capsule endoscope of the present invention.

【符号の説明】 DESCRIPTION OF SYMBOLS

１０ 撮像装置 １２ １４ 基板 ２０ イメージセンサ部 ２１ イメージセンサ ２２Ｈ 水平シフトレジスタ（走査手段） ２２Ｖ 垂直シフトレジスタ ２３ イメージエリア（光電変換手段） ３０ ビデオ信号生成回路 ３１ サンプルホールド回路（Ｓ／Ｈ） ３２ Ａ／Ｄコンバータ ３３ ビデオプロセッサ ３４ エンコーダ ４０ ＬＥＤ ４２ 第１発振器 ４４ インバータ ４６ タイミングジェネレータ（ＴＧ） ５０ 変調部 ５１ 変調器 ５２ 第２発振器 ５３ 掛け算器 ６０ 送信部 ６１ 発信器 ６２ 送信アンテナ ７０ バッテリー ７１ リードスイッチ ８０ カプセル内視鏡 Ｌ 撮像光学系 ｔ１ 光蓄積時間 ｔ２ 送信時間 10 the imaging apparatus 12 14 substrate 20 image sensor unit 21 image sensor 22H horizontal shift register (scan means) 22V vertical shift register 23 the image area (photoelectric conversion means) 30 a video signal generating circuit 31 sample-and-hold circuit (S / H) 32 A / D converter 33 the video processor 34 encoder 40 LED 42 first oscillator 44 inverter 46 a timing generator (TG) 50 modulating section 51 modulator 52 second oscillator 53 multiplier 60 transmission unit 61 transmitter 62 transmitting antenna 70 battery 71 reed switch 80 capsules endoscopes L imaging optical system t1 light accumulating time t2 transmission time

───────────────────────────────────────────────────── フロントページの続き (72)発明者 二ノ宮 一郎 東京都板橋区前野町２丁目36番９号 旭光 学工業株式会社内 (72)発明者 中村 哲也 東京都板橋区前野町２丁目36番９号 旭光 学工業株式会社内 (72)発明者 伏見 正寛 東京都板橋区前野町２丁目36番９号 旭光 学工業株式会社内 (72)発明者 江口 勝 東京都板橋区前野町２丁目36番９号 旭光 学工業株式会社内 (72)発明者 大原 健一 東京都板橋区前野町２丁目36番９号 旭光 学工業株式会社内 Ｆターム(参考） 4C061 BB01 CC06 DD10 GG22 JJ06 PP04 QQ06 RR03 UU06 ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Ichiro Ninomiya Itabashi-ku, Tokyo cortex-cho 2-chome No. 36 No. 9 rays of the rising sun chemical industry Co., Ltd. in the (72) inventor Tetsuya Nakamura Itabashi-ku, Tokyo cortex-cho 2-chome 36 No. 9 No. rays of the rising sun chemical industry Co., Ltd. in the (72) inventor Masahiro Fushimi Itabashi-ku, Tokyo cortex-cho 2-chome No. 36 No. 9 rays of the rising sun chemical industry Co., Ltd. in the (72) inventor Masaru Eguchi Itabashi-ku, Tokyo cortex-cho 2-chome 36 No. 9 No. rays of the rising sun chemical industry Co., Ltd. in the (72) inventor Kenichi Ohara Itabashi-ku, Tokyo cortex-cho 2-chome No. 36 No. 9 rays of the rising sun chemical industry Co., Ltd. in the F-term (reference) 4C061 BB01 CC06 DD10 GG22 JJ06 PP04 QQ06 RR03 UU06

Claims (6)

    【特許請求の範囲】 [The claims]
  1. 【請求項１】 体腔内の被検部を照明する照明手段と； 1. A illuminating means for illuminating the object part in the body cavity;
    被検部を撮像し、画像信号を出力する撮像手段と；画像信号を無線送信する送信手段と；電力を供給する電力供給手段と；を密閉カプセル内に備え、 少なくとも上記照明手段への電力供給をオンにして上記撮像手段に信号電荷を蓄積させる照明サイクルと；少なくとも上記撮像手段および送信手段への電力供給をオンにして上記画像信号を送信させる送信サイクルと；を交互に繰り返すことを特徴としたカプセル内視鏡の撮像装置。 Imaging the object part, and imaging means for outputting an image signal; an image signal transmitting means for wireless transmission; and a power supply means for supplying power; provided into the sealed capsule, at least power supply to the illumination means the turn on and light cycle to accumulate the signal charges in the image pickup means; and wherein alternately repeating, at least turn on the power supply to the imaging means and the transmitting means and the transmission cycle for transmitting the image signal imaging device the capsule endoscope.
  2. 【請求項２】 体腔内の被検部を照明する照明手段と； Wherein an illumination means for illuminating the object part in the body cavity;
    被写体光を信号電荷に光電変換し蓄積する光電変換手段と、蓄積した信号電荷を走査し読み出す走査手段を備え、該走査手段によって読み出した画像信号を出力するイメージセンサと；この画像信号を処理する信号処理手段と；上記イメージセンサが蓄積した信号電荷を画像信号として無線送信する送信手段と；電力を供給する電力供給手段と；を密閉カプセル内に備え、 少なくとも上記照明手段への電力供給をオンにし、上記イメージセンサの走査手段、信号処理手段および送信手段への電力供給をオフにして上記イメージセンサに信号電荷を蓄積させる照明サイクルと；少なくとも上記イメージセンサの走査手段、信号処理手段および送信手段への電力供給をオンにし、上記照明手段への電力供給をオフにして上記画像信号を送信させる Processing the image signal; comprising photoelectric conversion means for photoelectrically converting accumulate object light into a signal charge, a scanning means for reading and scanning the stored signal charges, an image sensor and which outputs an image signal read by said scanning means a signal processing unit; transmitting means and that said image sensor and wirelessly transmits the accumulated signal charges as an image signal; power supply means for supplying power and; provided in a sealed capsule, on the power supply to at least said illuminating means to, the scanning means of the image sensor, the signal processing means and the power supply to the transmission means by turning off the light cycle to accumulate the signal charges in the image sensor, at least the scanning means of the image sensor, the signal processing means and transmitting means Turn on the power supply to, to transmit the image signal to turn off the power supply to the illumination means 送信サイクルと；を交互に繰り返すことを特徴としたカプセル内視鏡の撮像装置。 Imaging device of the capsule endoscope characterized by repeating alternately; and transmission cycle.
  3. 【請求項３】 請求項１または２記載のカプセル内視鏡の撮像装置において、上記照明手段による所定距離の被写体照度に対応して、上記照明サイクルは１フィールド分または１フレーム分の信号電荷を蓄積可能な適正露出時間であり、上記送信サイクルは１フィールド分または１フレーム分の画像信号を読み出して送信可能な時間であるカプセル内視鏡の撮像装置。 3. A imaging apparatus according to claim 1 or 2 capsule endoscope according, to correspond to the object illuminance at a predetermined distance by the illumination means, the illumination cycle of one field or one frame of the signal charges accumulating a proper exposure time available, the transmission cycle is the imaging device of the capsule endoscope is transmittable time reads the image signal of one field or one frame.
  4. 【請求項４】 請求項１から３いずれか１項記載のカプセル内視鏡の撮像装置において、上記照明サイクルと送信サイクルを１秒間に１回ずつ実行するカプセル内視鏡の撮像装置。 4. A imaging device of the capsule endoscope according to claim 1 to 3 any one, the imaging device of the capsule endoscope to perform once the transmission cycle and the illumination cycles per second.
  5. 【請求項５】 請求項１から４いずれか１項記載のカプセル内視鏡の撮像装置において、上記照明手段は発光ダイオードであって、送信手段に電力が供給されたときには逆方向電圧がかかって消灯し、送信手段に電力が供給されていないときは順方向電圧がかかって点灯するように配置したカプセル内視鏡の撮像装置。 5. The imaging device of the capsule endoscope according to any one of claims 1-4, the said illumination means comprising a light emitting diode, when the power is supplied to the transmission means takes the reverse voltage extinguished, the imaging device of the capsule endoscope, which is arranged to light up takes forward voltage when no power is supplied to the transmitting means.
  6. 【請求項６】 請求項１から５いずれか１項記載のカプセル内視鏡の撮像装置において、上記走査手段、信号処理手段および送信手段と、照明手段とに対する電力供給の切換手段を備えたカプセル内視鏡の撮像装置。 The imaging apparatus wherein the capsule endoscope according to any one of claims 1 5, comprising the scanning means and the signal processing means and transmitting means, the switching means of the power supply to the illumination means Capsule imaging device of the endoscope.
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